Drill-vpress



- (No Model.)

W. E. GANG..

DRILL PRESS.

PatentedvN'ov. 3,1891.

UNITED STATI-3s PATENT Gwinn.

lVILlilAM ll. HANG, UF CINCINNATI. Ulllt).

SPECIFICATION forming part of Letters Patent No. 462,309, dated November 3, 1891.v Application filed August 3l, 1891. Serial No. 404,211. (No niodeLl To all whom t may con/cern:

Be it known that I, WiLLiAM E. GANG, a citizen of the United States, residing at Cincinnati, in the county of Hamilton and State ot' Ohio, have invented certain new and useful Improvementsin Drill-Presses; and I do hei-eby declare the following to be a full, clear, and exact description of the inventiomreference being had to the annexed drawings, which form part of this specification.

This invention relates to' those machineshop appliances commonly known as radial7 d rill-presses; and the first part of my improvements consists in .making the supporting column or posts of such presses of an upper and lower section, which latter is xed to the bedplate or other foundation, while the upper section is capable of being turned around4 on this stationary section. The upper section 'must-be hollow or tubular and have two diametrically-opposite longitudinal slots to admit a horizontal shaft having bevel-gear conlnections with the drill-spindle, the stock of the latter,together with said shaft, beingcarried by a radial ai'iii projecting from a slide that traverses one of said slots. This horizontal shaft has a bevel-gear connection with a vertical shaft housed within the upper or hollow section of the column; but in some cases the lower section may also be hollow and have said shaft carried down through it, as hereinafter more fully described. W'hen the column is thus formed of two hollow sections or membersfthe driving-shaft is situated at the base4 of the saine, and a system of bevelgears is employed for communicating motion `froni said shaft to the-drill-spindle, as hereinafter more fully described. Y In the annexed drawings, Figure 1 is a side elevation of my improved radial drill, tliennimportant accessories thereof being omitted. Fig. 2 is an enlarged axial section of the twopart column and its immediate attachments. Fig. 3 is an enlarged plan of the cimplingflange at the upper end of the lower pai-t of the column. Fig. 4 is a horizontal section of the ,upper member of said column.

-A represents a bed-plate or other foundation, to which is secured the lower stationaryy section or member B of the supporting column or post, which section is a stout casting with a bearing Z; at one -side thereof to admit a `driving-shaft C, the latter having a stepped `pulley c, that provides for a variable speed iii the usual manner, the concealedA end of said shaft being furnished with a bevel-gear D, that operates-the vertical shaft of the press, as will presently' appear. The upper end of this xed section ll has an annular flange it, provided with ananiiular groove c, which is wider at bottom than at top, and is adapted to receive the heads of inverted bolts e', said bolts being secured iii a similar flange l of the upper column-section G, the lower portion of which takes the shape of a tubular extension H. This extension or neck progects down into the other section B a suicient distance to alord the necessary rigidity of the column. Furthermore, this upper section G'has oiione side a wide longitudinal slot g and on the opposite. side a .relatively narrowerlongitudinal slot g', the Wide slot g being flanked with a pair of guides I l', having undercut edges, as seen in Fig. 4. Fitting snugly Within this Wide slot g is a stout slide J, preferably integral with a radial arm K, and having bindingscrews j, that bear against the undercut edge of guide I and thereby retain said arm and its attachments at any appropriate elevation. The principal fixture to this arm is a drillstock L, to whose spindle Z any forni of tool may be applied, said stock being advanced and retracted by a customary traversingscrew M, and the spindle being revolved by a bevel-gearNatits upper end. This gear N engages with a bevel-wlieel O, attached to a horizontal shaft o, that passes through the diametrically-opposite slots g g', and is Joni'- naled in a pair of bearings Z P, one of which Z is carried by the drill-stock L, while the other bearing P is fastened to the slide J, as more clearly seen in Fig. E?.

R is a bevel-gear that drives the shaft 0,-

wliich gear receives its motion froma similar wheel S at the upper end o-f a vertical. shaft T, that occupies an axial position within the tubular portion of the column, said shaf tl being confined to this position by the bearingP and the elongated hub of a bevel-gear U, situated near the base of section B. B is abeai'- ing within which this hub is journaled.

W is a turntable,whose supporting-bracket X is capable of being clamped to the stationary column E in the usual manner.

IOO

My machine is used in practically the same way as most drill-presses, thconly material difference being the method of securing the radial arm K at the desired elevation, which 5 attachment is readily effected by tightening the screw or screws j. This simple act so bends or springs the guides I l inwardly or toward each other as to clamp the slide J immovably in place, and therebyvprevent any 1o vertical shifting of the arm, although the latter can be readily swung around in a hori- Iontal plane to present the'dril'l in the most effective position for doing its work; but this arm can swing only as the upper section (i r 5 of the column turns onthe lower or immovable section B, preparatory t`0 which movement the nuts of bolts e must be nnslackvened, and when the desired position has been reached said nuts are again tightened. Conzo seqnently these bolts, together with the neck Il and flanges E F, coact in preserving the necessary rigidity of the 4supporting' part of the press and render the column as firm as though it were a single casting from top to 25 bottom. Motion is communicated from the driving-shaft C to thedrill or other tool by means of the gears D U, vertical shaft T,

gears S R, horizontal shaft o, gears N O, `and spindle Z, the proper shafts and gears being 3o provided with tongues and grooves or other similar appliances that will enable said shafts to turn and be shifted longitudinally as occasion requires. Finally, it will be noticed that this drill-press has very few exposed gears,

3 5 and heilig entirely free of overhead attachments it can be operated in man shops where the ordinary forms of such machines would be inadmissible.

I claim as my invention- 4o l. The combination, ina drill-press, of a lower stationary support and an upper tubular column turning thereon, said upper col- 'umn being provided with two diametricallyopposite longitudinal slots for the passage of a shaft carried by a slide from which a radial arm projects, which slide traverses one of said slots and has a device for retaining it at any desired elevation, substantially as herein described. I

2. The combination, in a drill-press, of the lower stationary tubular column l, the upper tubular column Gr, turning` thereon, which column Ghas two diametrically-opposite longitudinal slotsg g for the passage'of a shaft o, carried by a bearing P, and a slide J, from which latter projects the radial arm K, said arm being fui' ed with a shiftable tool-stock la, and gc; .I O R -S being employed for driv- `ing the spindle Z- from ayertical shaft 'l, oc-

cupying an axial position within said column 'B G, all as herein described.

In a drill-press column provided with a longitudinal slot g, having undercut guides I I on the sides thereof, the arm-slide J, trarersing said slot and furnished with a screwj, f

.VILTJAM lil. GANG.

Witnesses:

JAMES 1l. Lai/MAN, SAMUEL M. QUiNN.

'Correction iny Letters Patent No. 462,309.

Itis hereby-eertied'that in Letters-Patent No. 462,509, granted November 3, 1891, upou the application of William E. Gang, of Cincinnati, Ohio, for an improvement in Drill Presses, an error appears in the printed speeinonton reqnring correction as follows: in line 100, page-1, the reference letter B commencing the sentenoe,.shou1d the same may conform tof the record. of tliecese/nthe Patent Office. y v .Signed,'conntersigned, end sealed this 1st dayof December, A.` D. 1891.

p [SEAL] x oYUs-"BUSSEY,

)i Asz'stomt Secretary/vof titel-marier. 'I Countersignfe'; y

W. E. SIMONDS,

Commissioner of Patents.

read )Trend that the Letters Patent should be read with this correction therein that A 

